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coolcatco888
Asked: 2018-09-17 11:24:01 +0800 CST

Cannot boot into Windows 10 after upgrading Ubuntu 16.04 LTS to 18.04 LTS

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I noticed that whenever I try to select "Windows 10" from the grub boot screen, it turns black and then returns to Grub.

This happened after I upgraded Ubuntu 16.04 LTS to 18.04 LTS. I should note that I triple boot with Mac OSX High Sierra and chainload Clover from Grub. I also noticed that Clover does not detect Windows 10 as a bootable option anymore.

Does anyone have any ideas as to what is going on?

I have tried:

  1. sudo update-grub
  2. boot-repair

Nothing seemed to work. Any ideas?

Here is my boot-repair pastebin http://paste.ubuntu.com/p/jrzcMYk9WG/

Thanks!

grub2 boot upgrade dual-boot

1 Answers

  1. Best Answer

    I managed to get Windows to boot!!!

    Ok here is what I did to fix it:

    1. I launched a Windows Installer USB and entered the command line
    2. I ran bootrec /rebuildbcd to fix my BCD then
    3. bootsect /nt60 C: /force <-- This clears GRUB from the NTFS Boot sector
    4. Then GRUB couldn't boot Windows, it just went to a black screen with a DOS cursor
    5. To fix this I had to add: ntldr /bootmgr after chainloader +1 in my /boot/grub/grub.cfg

    The GRUB fix is here: *Grub* Windows 10 doesn't start anymore

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